Network Diagnostics on the app failing

I have a ASUS RT-AC86U with Merlig installed on it.
I am using the ASUS app from my hone to handle it - and its working but....
When I go to "Network Diagnostics" and I do a scan I pass the first part "Your device" with a "V" but get an "X" on the second check "Asus router". (see attached picture)
It does not continue to the next 2 checks

I get a message: "Please ensure that your ASUS router is turned on and your device is connected to the correct Wi-Fi network."

I have a second question that might relate to this issue:
I have a schedule set up to limit my children to use the internet at certain hours. Some times I want to block / allow the internet not according to schedule.
On the App , I go to family and then press the Pause button near the child's name and I get this message:
"Broken Network will clear all schedule block settings. Do you want to continue?"

I do not want to delete the schedule - is this possible? does this relate to the original issue?